If you like what I've done and would like to help out, then you are more than free to make a donation of however much you want, by simply using the Register application that has been included within the application folder. The minimum amount that I suggest is $5, although you can add more if you are feeling generous.
You first double-click on the Register icon in order to start it up. Once you have the Register screen up, you need to fill in the following details:
1) Your name in the "Register To:" field.
2) Your email address (if you have one, so that I might send you a "Thank You") in the "Email Address:" field.
3) Send a comment about which of products you are making a donation for by clicking on the little balloon next to the "Donation by Single Brain Cell" string, and filling out the appropriate fields in that dialog box.
4) Insert the number 1 in the "Single User @US$5".
5) Enter the extra amount that you'd like to donate in the "Bonus US$" field.
6) Select your payment method and fill in as required.
7) Then Print a copy if you as sending the donation by post, or Save to file if you are making the donation over the internet using a credit card.
8) Send your payment details and payment to Kagi for processing.
One thing that I'd like you to do is to type in the comments (at step 3) the names of my applications that you are providing a donation for. Notice that you are allowed to make a donation for more than one product at a time. The reason why I ask you to do this inconvenient step is so that I know out of which of my products are the ones that you are most interested in. This means that I can latter tailor my application development to your tastes.
As a final - and obvious - note: if you are sending the donation via the internet, notice that you can't send cheques or money orders this way. If you are paying by cheque or money order, remember to send these to Kagi via the standard surface post. (I really shouldn't have to have included this last point, but some people seem to make this mistake.)